Behavioural lateralization in Budgerigars varies with the task and the individual

Area of Science:

• Ethology
• Animal Behavior
• Comparative Psychology

Background:

• Lateralization, or handedness/footedness, is observed in many species but often studied at population levels.
• Individual consistency of behavioral biases across different tasks remains less understood.
• Budgerigars (Melopsittacus undulatus), social parrots, provide a model for studying individual lateralization.

Purpose of the Study:

• To investigate individual behavioral lateralization in budgerigars across various tasks.
• To determine the consistency of paw preference for climbing and landing.
• To examine the influence of social interaction on individual biases.

Main Methods:

• Observed 12 male budgerigars performing 5 distinct tasks involving climbing and landing on perches.
• Quantified individual paw preferences for each task.
• Analyzed the relationship between climbing and landing foot biases.
• Assessed the impact of simultaneous task performance with another bird.

Main Results:

• Budgerigars displayed significant, individually specific biases in paw preference.
• Paw preference strength and direction varied considerably across different tasks.
• The preferred foot for climbing did not consistently match the preferred foot for landing.
• Social competition completely overrode individual paw preferences.

Conclusions:

• Individual behavioral lateralization in budgerigars is task-dependent and not always consistent.
• Landing behavior appears independent of climbing foot bias.
• Social context significantly modulates or overrides individual lateralization in budgerigars.